沉积与特提斯地质2024，Vol.44Issue(4)：826-839,14.DOI:10.19826/j.cnki.1009-3850.2023.11001
准噶尔盆地阜康凹陷中—上二叠统砂砾岩中自生沸石成因及对储层发育的影响
Origin of authigenic zeolite and its influence on reservoir development in glutenites of the Middle-Upper Permian in Fukang Sag,Junggar Basin
摘要
Abstract
The origin of authigenic zeolites and the main reservoir space types in glutenite reservoirs of the Middle-Upper Permian in the Fukang Sag,Junggar Basin,remain unclear.This study utilizes methods such as optical microscope,scanning electron microscope(SEM),energy spectrum analysis,and X-ray diffraction(XRD)analysis to investigate occurrence characteristics,as well as the origin and its influence of authigenic zeolites on reservoir development in the glutenite reservoirs.The results are as follows:(1)Laumontites are identified as the predominant authigenic zeolites,with minor occurrences of analcimes in poikilitic and interparticle-pore filling forms.(2)Early-stage poikilitic laumontites and analcimes formed during phase A of eodiagenesis,while middle-stage interparticle-pore filling laumontites and analcime formed during phase B of eodiagenesis.Late-stage replacive laumontites formed during late phase A and phase B of mesodiagenesis.(3)The materials for early-stage zeolites originated from the hydration-hydrolysis of plagioclase and magmatic rock fragments,and the dissolution of CO2 from biological degradation,which formed through the hydration and albitization of plagioclase.Middle-late stage laumonites,related to the dissolution of plagioclase and magmatic rock fragments by organic acids and CO2 due to thermal evolution of kerogen,formed through plagioclase albitization and analcime alteration in Ca2+-rich solutions.(4)The glutenite is characterized by"intense dissolution of zeolite and no(or weak)dissolution of calcite",with the intergranular laumontite dissolution pores being the most important type of reservoir space.The intense dissolution of laumontites significantly enhances reservoir quality and is a key controlling factor in the formation of glutenite reservoirs.关键词
阜康凹陷/中—上二叠统/砂砾岩/自生沸石/成因/溶蚀孔隙Key words
Fukang Sag/Middle-Upper Permian/glutenite/authigenic zeolite/origin/dissolution pore分类
天文与地球科学引用本文复制引用
刘超威,樊向东,吕正祥,陈梦娜,李宗浩,卿元华,张蓉,杨和山,黄志强,王泽胜..准噶尔盆地阜康凹陷中—上二叠统砂砾岩中自生沸石成因及对储层发育的影响[J].沉积与特提斯地质,2024,44(4):826-839,14.基金项目
中国石油股份公司前瞻性基础性技术攻关项目"地层不整合油气藏成藏主控因素与关键要素定量评价技术研究"(2021DJ0405),"准噶尔盆地全油气系统地质理论与勘探实践"(2022DJ0108) （2021DJ0405）
